Reference this Research Paper (copy & paste below code):
Tamil Selvan.T and Latha Maheswari. M (2017); Existence of solutions of nonlinear fractional impulsive delay integro differential equation of Sobolev type;
Int J Sci Res Publ 7(6) (ISSN: 2250-3153). http://www.ijsrp.org/research-paper-0617.php?rp=P666501